Unlock instant, AI-driven research and patent intelligence for your innovation.

Charge amplification full-differential circuit-based detector movement and detector

A charge amplification and geophone technology, which is applied in the direction of instruments, scientific instruments, seismic signal receivers, etc., can solve the problems of piezoelectric geophone performance improvement limitations, cable resistance and distributed capacitance loss, and cables are not easy to be too long, etc. Achieve the effect of strengthening the overall anti-interference ability, reducing the difficulty of assembly, and improving production efficiency

Inactive Publication Date: 2019-10-01
西安陆海地球物理科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the principle of voltage extraction and amplification is applied to the detector, there are strict requirements on the circuit. First, compared with the piezoelectric capacitive characteristics, it must have a sufficiently high input impedance to effectively extract the required low-frequency information, but too high input impedance will bring The intensification of noise and zero drift; secondly, the direct connection cable between the circuit and the piezoelectric crystal-based shock unit (movement) should not be too long, otherwise the cable resistance and distributed capacitance will bring greater loss and greater interference
Only these two points have brought certain restrictions on the performance improvement of piezoelectric detectors using voltage extraction and amplification.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Charge amplification full-differential circuit-based detector movement and detector
  • Charge amplification full-differential circuit-based detector movement and detector
  • Charge amplification full-differential circuit-based detector movement and detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as Figure 1-7 A detector core based on a fully differential charge amplification circuit shown in the figure at least includes a core shell 1, an upper cover 2 and a support frame, the upper surface of the upper cover 2 is provided with a through hole at the center, and the upper cover 2 is placed On the core shell 1, the support frame is connected in the core shell 1; the support frame includes a support 3 and a support ring 4, the support 3 is connected to the inner wall of the core shell 1, and the inner wall of the support 3 is arranged at intervals The support ring 4 also includes 1-4 core units, and the core unit is horizontally connected between the upper and lower adjacent support rings 4; the core unit includes two pairs of independent vibration units, a hollow screw 5 and a substrate 6. The outer edge of the independent vibration unit has a lead wire, and the center of the independent vibration unit and the substrate 6 has a coaxial through hole, and the...

Embodiment 2

[0037] Such as figure 1 and Figure 4 A detector core based on a charge amplification full differential circuit shown differs from Embodiment 1 in that the independent vibration unit is composed of a mass body 7 and an electromechanical conversion element 8, and the mass body 7 and the electromechanical The conversion element 8 has a coaxial through hole, and the outer diameter of the mass body 7 is smaller than the outer diameter of the electromechanical conversion element 8. The electromechanical conversion element 8 is placed between the substrate 6 and the mass body 7, and the outer edge of the electromechanical conversion element 8 There is a lead wire connected.

[0038] Preferably, the electromechanical conversion element 8 is a piezoelectric wafer or a piezoelectric ceramic sheet.

[0039]In actual use, the weights of all the mass bodies 7 are consistent, and the setting of the mass bodies 7 with the same weight ensures that the piezoelectric wafer is at the center o...

Embodiment 3

[0041] Such as figure 1 and Figure 4 The difference between the shown detector movement based on the charge amplification fully differential circuit and the embodiment 1 is that the upper cover 2 and the outer casing 1 of the movement are made of metal.

[0042] In actual use, the upper cover 2 and the movement casing 1 are made of metal to shield the movement electromagnetically, which enhances the overall anti-interference ability of the detector.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of seismic exploration, and particularly relates to a charge amplification full-differential circuit-based detector movement and a detector. By virtue of the technical scheme that movement units are connected in series and in parallel based on a charge extraction mode, a central grounding mode is adopted, and two pairs of independent vibration units which are symmetrically arranged up and down are fastened together through hollow screws, a detector movement capable of effectively improving the low-frequency receiving capacity without needing relatively high input impedance is provided; by virtue of the detector movement, no matter how long a transmission line is, a relatively high common-mode rejection ratio can be provided to resist interference of noise, and the attenuation of the voltage amplitude of a transmission signal cannot be influenced; and the invention provides the detector movement, the distribution capacitance of which does notinfluence the bandwidth of a frequency band.

Description

technical field [0001] The invention belongs to the technical field of seismic exploration, in particular to a detector core and a detector based on a charge amplification full differential circuit. Background technique [0002] In the seismic exploration system, the seismic wave generated by the artificial seismic source propagates deep into the formation, and after being reflected by the formation, the reflected wave with formation information is transmitted to the geophone on the ground for reception. The geophone undertakes the task of converting the received reflected wave signal into an electrical signal and outputting it to subsequent seismic exploration instruments. Due to the limitation of the source strength and the attenuation of the formation medium, the formation reflection signal received by the geophone is very weak. To reflect formation information completely and accurately, the geophone must be required to have sufficient sensitivity and sufficient bandwidt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01V1/18
CPCG01V1/181
Inventor 白程
Owner 西安陆海地球物理科技有限公司